FreeBSD/Linux Kernel Cross Reference
sys/sys/systm.h

     /*-
      * Copyright (c) 1982, 1988, 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      * (c) UNIX System Laboratories, Inc.
      * All or some portions of this file are derived from material licensed
      * to the University of California by American Telephone and Telegraph
      * Co. or Unix System Laboratories, Inc. and are reproduced herein with
      * the permission of UNIX System Laboratories, Inc.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)systm.h     8.7 (Berkeley) 3/29/95
     * $FreeBSD$
     */
    
    #ifndef _SYS_SYSTM_H_
    #define _SYS_SYSTM_H_
    
    #include <machine/cpufunc.h>
    #include <sys/callout.h>
    
    extern int securelevel;         /* system security level (see init(8)) */
    
    extern int cold;                /* nonzero if we are doing a cold boot */
    extern const char *panicstr;    /* panic message */
    extern int safepri;             /* safe ipl when cold or panicing */
    extern char version[];          /* system version */
    extern char copyright[];        /* system copyright */
    
    extern int nblkdev;             /* number of entries in bdevsw */
    extern int nchrdev;             /* number of entries in cdevsw */
    extern int nswap;               /* size of swap space */
    
    extern int selwait;             /* select timeout address */
    
    extern u_char curpriority;      /* priority of current process */
    
    extern int physmem;             /* physical memory */
    
    extern dev_t dumpdev;           /* dump device */
    extern long dumplo;             /* offset into dumpdev */
    
    extern dev_t rootdev;           /* root device */
    extern dev_t rootdevs[2];       /* possible root devices */
    extern char *rootdevnames[2];   /* names of possible root devices */
    extern struct vnode *rootvp;    /* vnode equivalent to above */
    
    extern struct vnode *swapdev_vp;/* vnode for swap device */
    
    extern int boothowto;           /* reboot flags, from console subsystem */
    extern int bootverbose;         /* nonzero to print verbose messages */
    
    #ifdef  INVARIANTS              /* The option is always available */
    #define KASSERT(exp,msg)        do { if (!(exp)) panic msg; } while (0)
    #else
    #define KASSERT(exp,msg)
    #endif
    
    /*
     * General function declarations.
     */
    
    struct clockframe;
    struct malloc_type;
    struct proc;
    struct timeval;
    struct tty;
    struct uio;
    
    void    Debugger __P((const char *msg));
    int     nullop __P((void));
    int     eopnotsupp __P((void));
    int     einval __P((void));
   int     seltrue __P((dev_t dev, int which, struct proc *p));
   int     ureadc __P((int, struct uio *));
   void    *hashinit __P((int count, struct malloc_type *type, u_long *hashmask));
   void    *phashinit __P((int count, struct malloc_type *type, u_long *nentries));
   
   void    panic __P((const char *, ...)) __dead2 __printflike(1, 2);
   void    cpu_boot __P((int));
   void    cpu_rootconf __P((void));
   void    cpu_dumpconf __P((void));
   void    tablefull __P((const char *));
   int     addlog __P((const char *, ...)) __printflike(1, 2);
   int     kvprintf __P((char const *, void (*)(int, void*), void *, int,
                         _BSD_VA_LIST_)) __printflike(1, 0);
   void    log __P((int, const char *, ...)) __printflike(2, 3);
   void    logwakeup __P((void));
   int     printf __P((const char *, ...)) __printflike(1, 2);
   int     snprintf __P((char *, size_t, const char *, ...)) __printflike(3, 4);
   int     sprintf __P((char *buf, const char *, ...)) __printflike(2, 3);
   void    uprintf __P((const char *, ...)) __printflike(1, 2);
   void    vprintf __P((const char *, _BSD_VA_LIST_)) __printflike(1, 0);
   int     vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_)) __printflike(3, 0);
   int     vsprintf __P((char *buf, const char *, _BSD_VA_LIST_)) __printflike(2, 0);
   void    ttyprintf __P((struct tty *, const char *, ...)) __printflike(2, 3);
   int     sscanf __P((const char *, char const *, ...));
   int     vsscanf __P((const char *, char const *, _BSD_VA_LIST_));
   long    strtol __P((const char *, char **, int));
   u_long  strtoul __P((const char *, char **, int));
   quad_t  strtoq __P((const char *, char **, int));
   u_quad_t strtouq __P((const char *, char **, int));
   
   void    bcopy __P((const void *from, void *to, size_t len));
   void    ovbcopy __P((const void *from, void *to, size_t len));
   #ifdef __i386__
   extern void     (*bzero) __P((void *buf, size_t len));
   #else
   void    bzero __P((void *buf, size_t len));
   #endif
   
   void    *memcpy __P((void *to, const void *from, size_t len));
   
   int     copystr __P((const void *kfaddr, void *kdaddr, size_t len,
                   size_t *lencopied));
   int     copyinstr __P((const void *udaddr, void *kaddr, size_t len,
                   size_t *lencopied));
   int     copyin __P((const void *udaddr, void *kaddr, size_t len));
   int     copyout __P((const void *kaddr, void *udaddr, size_t len));
   
   int     fubyte __P((const void *base));
   int     subyte __P((void *base, int byte));
   int     suibyte __P((void *base, int byte));
   long    fuword __P((const void *base));
   int     suword __P((void *base, long word));
   long    fusword __P((void *base));
   int     susword __P((void *base, long word));
   
   void    realitexpire __P((void *));
   
   void    hardclock __P((struct clockframe *frame));
   void    softclock __P((void));
   void    statclock __P((struct clockframe *frame));
   
   void    startprofclock __P((struct proc *));
   void    stopprofclock __P((struct proc *));
   void    setstatclockrate __P((int hzrate));
   
   char    *getenv __P((char *name));
   int     getenv_int __P((char *name, int *data));
   quad_t  getenv_quad __P((char *name, quad_t *data));
   extern char *kern_envp;
   
   #ifdef APM_FIXUP_CALLTODO 
   void    adjust_timeout_calltodo __P((struct timeval *time_change)); 
   #endif /* APM_FIXUP_CALLTODO */ 
   
   #include <sys/libkern.h>
   
   /* Initialize the world */
   void    consinit __P((void));
   void    cpu_initclocks __P((void));
   void    nchinit __P((void));
   void    usrinfoinit __P((void));
   void    vntblinit __P((void));
   
   /* Finalize the world. */
   void    shutdown_nice __P((void));
   
   /*
    * Kernel to clock driver interface.
    */
   void    inittodr __P((time_t base));
   void    resettodr __P((void));
   void    startrtclock __P((void));
   
   /* Timeouts */
   typedef void timeout_t __P((void *));   /* timeout function type */
   #define CALLOUT_HANDLE_INITIALIZER(handle)      \
           { NULL }
   
   void    callout_handle_init __P((struct callout_handle *));
   struct  callout_handle timeout __P((timeout_t *, void *, int));
   void    untimeout __P((timeout_t *, void *, struct callout_handle));
   
   /* Interrupt management */
   
   #ifdef __i386__
   void            setdelayed __P((void));
   void            setsoftast __P((void));
   void            setsoftcambio __P((void));
   void            setsoftcamnet __P((void));
   void            setsoftclock __P((void));
   void            setsoftnet __P((void));
   void            setsofttty __P((void));
   void            setsoftvm __P((void));
   void            schedsoftcamnet __P((void));
   void            schedsoftcambio __P((void));
   void            schedsoftnet __P((void));
   void            schedsofttty __P((void));
   void            schedsoftvm __P((void));
   intrmask_t      softclockpending __P((void));
   void            spl0 __P((void));
   intrmask_t      splbio __P((void));
   intrmask_t      splcam __P((void));
   intrmask_t      splclock __P((void));
   intrmask_t      splhigh __P((void));
   intrmask_t      splimp __P((void));
   intrmask_t      splnet __P((void));
   #ifdef SMP
   intrmask_t      splq __P((intrmask_t mask));
   #endif
   intrmask_t      splsoftcam __P((void));
   intrmask_t      splsoftcambio __P((void));
   intrmask_t      splsoftcamnet __P((void));
   intrmask_t      splsoftclock __P((void));
   intrmask_t      splsofttty __P((void));
   intrmask_t      splsoftvm __P((void));
   intrmask_t      splstatclock __P((void));
   intrmask_t      spltty __P((void));
   intrmask_t      splvm __P((void));
   void            splx __P((intrmask_t ipl));
   void            splz __P((void));
   #endif /* __i386__ */
   
   #ifdef __alpha__
   #include <machine/ipl.h>
   #endif
   
   /*
    * XXX It's not clear how "machine independent" these will be yet, but
    * they are used all over the place especially in pci drivers.  We would
    * have to modify lots of drivers since <machine/cpufunc.h> no longer
    * implicitly causes these to be defined when it #included <machine/spl.h>
    */
   extern intrmask_t bio_imask;    /* group of interrupts masked with splbio() */
   extern intrmask_t cam_imask;    /* group of interrupts masked with splcam() */
   extern intrmask_t net_imask;    /* group of interrupts masked with splimp() */
   extern intrmask_t stat_imask;   /* interrupts masked with splstatclock() */
   extern intrmask_t tty_imask;    /* group of interrupts masked with spltty() */
   
   /* Read only */
   extern const intrmask_t soft_imask;    /* interrupts masked with splsoft*() */
   extern const intrmask_t softnet_imask; /* interrupt masked with splnet() */
   extern const intrmask_t softtty_imask; /* interrupt masked with splsofttty() */
   
   /*
    * Various callout lists.
    */
   
   /* Exit callout list declarations. */
   typedef void (*exitlist_fn) __P((struct proc *procp));
   
   int     at_exit __P((exitlist_fn function));
   int     rm_at_exit __P((exitlist_fn function));
   
   /* Fork callout list declarations. */
   typedef void (*forklist_fn) __P((struct proc *parent, struct proc *child,
                                    int flags));
   
   int     at_fork __P((forklist_fn function));
   int     rm_at_fork __P((forklist_fn function));
   
   /* Shutdown callout list definitions and declarations. */
   #define SHUTDOWN_PRE_SYNC       0
   #define SHUTDOWN_POST_SYNC      1
   #define SHUTDOWN_FINAL          2
   #define SHUTDOWN_PRI_FIRST      0
   #define SHUTDOWN_PRI_DEFAULT    10000
   #define SHUTDOWN_PRI_LAST       20000
   
   typedef void (*bootlist_fn) __P((int, void *));
   
   int     at_shutdown __P((bootlist_fn function, void *arg, int position));
   int     at_shutdown_pri __P((bootlist_fn function, void *arg, int position, int pri));
   int     rm_at_shutdown __P((bootlist_fn function, void *arg));
   
   /*
    * Not exactly a callout LIST, but a callout entry.
    * Allow an external module to define a hardware watchdog tickler.
    * Normally a process would do this, but there are times when the
    * kernel needs to be able to hold off the watchdog, when the process
    * is not active, e.g., when dumping core.
    */
   typedef void (*watchdog_tickle_fn) __P((void));
   
   extern watchdog_tickle_fn       wdog_tickler;
   
   /* 
    * Common `proc' functions are declared here so that proc.h can be included
    * less often.
    */
   int     tsleep __P((void *chan, int pri, const char *wmesg, int timo));
   int     asleep __P((void *chan, int pri, const char *wmesg, int timo));
   int     await  __P((int pri, int timo));
   void    wakeup __P((void *chan));
   
   #endif /* !_SYS_SYSTM_H_ */

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